The migration of high performance computing to distributed parallel supercomputers has promoted the development of the message passing interface (MPI) software, the use of reliable commodity processors, and more widespread use of parallel programming strategies for applications. These developments, together with the affordability of high performance commodity-off-the-shelf (COTS) processors and supporting communication hardware, are the foundations for the PC cluster revolution that is now taking place. In just a few years we have witnessed interest in cluster grow from a curiosity to widespread, practical use.
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